The great pyramid in giza, egypt, is a square pyramid. the dimensions of the pyramid at the time of its completion are shown in the net. what is the surface area of the great pyramid, including the base? enter your answer in the box. m²

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First you would find the area of the square:        230*230= 52,900Next you would find the area of one on the triangles:        230*187=43,010 * 1/2=  21,505Then you would multiply the area of the one triangle by four:       21,505*4= 86,020Finally, you would add the area of the square to the combined area of the triangles:        86,020+ 52,900=138,920